Add facebook comments plugin

Author: riverfor

docs/index.html

@@ -282,6 +282,17 @@ <h2>如何贡献<a class="headerlink" href="#id12" title="Permalink to this head
     </div>
 
 
+  <hr/>
+<script>(function(d, s, id) {
+  var js, fjs = d.getElementsByTagName(s)[0];
+  if (d.getElementById(id)) return;
+  js = d.createElement(s); js.id = id;
+  js.src = "//connect.facebook.net/en_US/sdk.js#xfbml=1&version=v2.8&appId=1680815145503311";
+  fjs.parentNode.insertBefore(js, fjs);
+}(document, 'script', 'facebook-jssdk'));</script>
+
+<div class="fb-comments" data-href="http://qpython.org" data-numposts="10"></div>
+
   <hr/>
 
   <div role="contentinfo">